EP 0600441 A1 19940608 - Laser marking and printing ink therefor.
Title (en)
Laser marking and printing ink therefor.
Title (de)
Laserbeschriftung und Druckfarbstoff zur Beschriftung.
Title (fr)
Marquage par laser et encre pour l'impression.
Publication
Application
Priority
JP 32008692 A 19921130
Abstract (en)
A non-destructive laser marking method comprising irradiating laser light on a thermosensitive color-forming layer formed by printing with a printing ink containing a leuco dye as a color former and an acidic substance as a color developer, and at least one background color formation inhibitor selected from the group consisting of a water-soluble amino acid, an ammonium salt of an inorganic acid, a pH buffer, and water. Laser marking can be achieved with low energy and at high speed while minimizing background color formation to provide a high-contrast color image.
IPC 1-7
IPC 8 full level
B41M 5/26 (2006.01); B41M 5/28 (2006.01); B41M 5/30 (2006.01); B41M 5/333 (2006.01); B41M 5/337 (2006.01); B41M 5/36 (2006.01); B41M 5/46 (2006.01); B65C 9/46 (2006.01); C09D 11/00 (2014.01); C09D 11/02 (2014.01); C09D 11/033 (2014.01)
CPC (source: EP US)
B41J 2/442 (2013.01 - EP US); B41M 5/30 (2013.01 - EP US); B41M 5/3375 (2013.01 - EP US); B65C 9/46 (2013.01 - EP US); C09D 11/03 (2013.01 - EP US); C09D 11/037 (2013.01 - EP US)
Citation (search report)
- [XA] EP 0097220 A2 19840104 - IBM [US]
- [XA] EP 0133182 A1 19850220 - MITSUI TOATSU CHEMICALS [JP]
- [XA] EP 0289041 A2 19881102 - JUJO PAPER CO LTD [JP], et al
- [XA] EP 0439369 A1 19910731 - FUJI PHOTO FILM CO LTD [JP]
- [A] GB 2235060 A 19910220 - JUJO PAPER CO LTD [JP]
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 0600441 A1 19940608; EP 0600441 B1 19970702; DE 69311881 D1 19970807; DE 69311881 T2 19971016; JP 2751089 B2 19980518; JP H06166266 A 19940614; US 5413629 A 19950509
DOCDB simple family (application)
EP 93119282 A 19931130; DE 69311881 T 19931130; JP 32008692 A 19921130; US 15884593 A 19931129